Focusing of radially and azimuthally polarized beams through a uniaxial crystal

Abstract

We calculated and measured the difference between focal positions of radially and azimuthally polarized beams after passing through a uniaxial crystal. Calculations were carried out on the basis of the ray optics and the vector diffraction theory. The results of the calculations were in good agreement with those of the experiment. In addition, we discussed the polarization selection in a hemispherical laser cavity that was used for the generation of a radially polarized beam by use of the birefringence of a c-cut Nd:YVO4 laser crystal [Opt. Lett. 31, 2151 (2006)]. The stability range of the laser cavity length for the generation of a radially polarized beam was also in good agreement with the differences mentioned above.

Tight Focusing Properties of Circularly Polarized Annular Multi-Gaussian Beam through a Uniaxial Birefringent Crystal

“…Stallinga, et al briefly explained the vectorial approach of focusing into the uniaxial crystal [30]. Radially and azimuthally polarized vortex beams through a uniaxial crystal system are studied numerically and experimentally [31,32]. Recently properties of circularly polarized beam have explained by many researchers [33][34][35][36][37].…”

Microholographic Optical Data Storage with Spatial Mode Multiplexing

“…The focused light beams are split into ordinary and extraordinary light beams due to the birefringence of the medium and they are focused on different positions. 28) We arranged the objectives and the medium so that the ordinary light components of the two recording beams were focused on the same position. One of the recording beams, which we call the first recording beam, was always set as right-circular polarization by inserting a quarter-wave plate in the beam path.…”

Aberration on excitation focal spot caused by oblique interface with refractive indices discontinuous and its correction with pure‐phase compensation for laser scanning microscopy

“…10,11 Later, based on vectorial Debye theory, Gu et al theoretically studied the expression of the electric field and aberration of light passing through a vertical dielectric surface. 12 The shaping, shifting and stretching of linearly polarised beam focused through the interfaces between different mediums, such as air-silicon, 10 air-glass, 13 glass-water 14 and air-birefringent crystal 15,16 have been investigated in detail. The characteristics of tightly converging cylindrically polarised beams 15,[17][18][19] and Bessel-modulated beams 18 through dielectric interfaces are systematically studied as well.…”